Hello! I am trying to mint 50k nfts of which 10k are gold nfts. I need to generate random IDs for these 10k gold nfts. Which is more reasonable? off-chain script or on-chain smart contract... Some more things to consider like gas, decentralizedness. Can anybody help answering? thanks

Mar 21, 2022, 11:10 AM

Use oracle service like vrf

Costly, but decentralised

Mar 21, 2022, 11:19 AM

calling chainlink vrf 10k times is too costly, any other solutions like off-chain js script?

Mar 21, 2022, 11:26 AM

There's an unconventional way to get random number from chainlink without paying fee. The pricefeed oracle :)

Mar 21, 2022, 11:28 AM

Can you share link?

Mar 21, 2022, 11:29 AM

Its just using the price of native coin as random number

ETH maybe 3013.21$ on current block, 3012.81 on next. Noone can predict that right xD

Mar 21, 2022, 11:31 AM

@grimreaper619 That makes sense, sounds like random but what would they think of? I mean users... would they believe it truly random?

Mar 21, 2022, 11:32 AM

It should be fairly random. From a users perspective, I don't think they care much about how the random number is generated

Mar 21, 2022, 11:33 AM

Okay, I have to create 10k random numbers then I need to wait 10k blocks?

Mar 21, 2022, 11:34 AM

Call the pricefeed and fetch the value when user tries to mint

Mar 21, 2022, 11:35 AM

this random generation would happen after private sale,

Mar 21, 2022, 11:35 AM

You are minting them yourself and distributing randomly?

Mar 21, 2022, 11:37 AM

@grimreaper619
sorry for making things harder, long story short, how often does chainlink update coin prices? maybe once a block or 5 mins

Mar 21, 2022, 11:38 AM

They use some sort of threshold time value for each coin. Refer their docs

Mar 21, 2022, 11:42 AM

@grimreaper619 Thanks!

Mar 21, 2022, 11:49 AM